4-Cyano-3-nitro-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Cyano-3-nitro-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Fluoro-6-nitro-4-(trifluoromethoxy)pyridine-3-methanol
2-(Chloromethyl)-4-cyano-6-methoxy-3-(trifluoromethoxy)pyridine